Preventing Enamel Caries Using Carbon Dioxide Laser and Silver Diamine Fluoride

Area of Science:

• Dental Materials Science
• Biomaterials
• Caries Prevention Research

Background:

• Dental caries remains a significant global health issue, necessitating innovative prevention strategies.
• Silver diamine fluoride (SDF) is an effective topical agent for caries arrest and prevention.
• Carbon dioxide (CO2) lasers show potential in modifying dental hard tissues for enhanced resistance.

Purpose of the Study:

• To investigate the synergistic caries prevention potential of combining CO2 laser irradiation with SDF application on human enamel.
• To evaluate the effects of CO2 laser and SDF, individually and in combination, on enamel's resistance to cariogenic challenge.

Main Methods:

• Human enamel specimens were divided into four groups: SDF only, CO2 laser only, CO2 laser followed by SDF, and untreated control.
• Specimens underwent pH cycling to simulate cariogenic conditions.
• Assessed parameters included lesion depth, microhardness, surface morphology, and elemental analysis (calcium-to-phosphorus ratio).

Main Results:

• The combined CO2 laser and SDF treatment group exhibited the least lesion depth (18 ± 15 μm) and highest microhardness (78 ± 27 Knoop).
• Both individual CO2 laser and SDF treatments significantly reduced lesion depth and increased microhardness compared to the untreated control group.
• Elemental analysis revealed higher calcium-to-phosphorus ratios in treated groups, indicating enhanced mineral content and integrity.

Conclusions:

• CO2 laser irradiation and SDF application, when used individually, effectively enhance enamel's resistance to demineralization.
• The combination of CO2 laser irradiation followed by SDF application demonstrates a significant additive effect, providing superior protection against caries.
• This combined therapeutic approach holds considerable promise for advanced caries prevention strategies in clinical dentistry.